AWS introduces push architecture to automatically update Agent registry

On November 12, 2026, the AWS Machine Learning Blog published a post titled "Automate updates to the AWS Agent Registry with a push-based architecture," describing an event-driven setup that keeps the AWS Agent Registry current automatically. The design uses AWS CloudTrail, Amazon EventBridge, AWS Lambda, and AgentCore Identity to detect changes to MCP servers and then pushes updated tool metadata to the registry. According to the post, the pipeline works in both single-account and multi-account environments, and it carries no stored secrets. That is all the coverage available so far, with no further developments reported. The underlying idea is simple: instead of periodically polling MCP servers for updates, the architecture reacts to events that signal a change and forwards the refreshed metadata straight into the registry. This push-oriented approach is intended to make registry content more timely while keeping configuration simple.